Extensible and retractable tubular extension of body suctorians: mostly stiffened by microtubular bundles, contains extrusomes at its capitate tip, and vesicles for formation of food vacuole membranes. Used in prey capture and as ingestatory apparatus.

[Hydromedusae] See Marginal tentacle.

[Siphonophora] A hollow, highly contractile organ with sensory. feeding and occasionally anchoring functions.

[Gastropoda general] Before the eyes in heteropods, usually the tentacles are finger-shaped outgrows of the body; the eyes in pteropods are placed on the dorsal or nuchal tentacles in the neck region, these are very flat structures and only well visible in Thecosomata; the term tentacle is also used for the two tubercles found on top of the hood covering the head, these are the anterior tentacles.

[Pteropoda] Usually the tentacles are finger-shaped outgrowths of the body; the eyes in pteropods are located on the dorsal or nuchal tentacles in the neck region. The term tentacle is also used for the two tubercles found on top of the hood covering the head (anterior tentacles).

Alternative forms for Tentacle : [Pteropoda] Anterior tentacle, [Pteropoda] Dorsal tentacle.